Dometic FreshJet 5 Series 15,000 BTU Mechanical Rooftop Air Conditioner – White (FJX5557MW)
Low-Profile | 115V AC / 12V DC | Cool-Only | Direct Replacement for Penguin II
The Dometic FreshJet 5 Series 15K BTU Mechanical Air Conditioner is a high-capacity, low-profile rooftop unit engineered for powerful cooling in a compact, aerodynamic package. Designed as a direct replacement for the Dometic Penguin II, this model offers quieter operation, enhanced vibration control, and improved durability — ideal for both new RV builds and retrofit installations.
Key Features
- 15,000 BTU Cooling Capacity – Efficiently cools large RV interiors
- Low-Profile Design – Sleek, aerodynamic look for reduced drag
- Cool-Only Operation – Mechanical controls (heat pump version sold separately)
- High-Efficiency Airflow – 350 CFM blower with powerful front and rear distribution
- Quiet Operation – Vibration-isolated compressor for reduced noise
- Durable Construction – Reinforced steel base and injection-molded shroud
- CSA Certified
- Legacy Dometic SKUs: 640316, 641916, 641816
Specifications
General
- Model: FJX5557MW (Label: FJX5557MWHCS)
- Color: White
- Weight: 95.26 lbs (Unit) / 106.28 lbs (Shipping)
Electrical
- AC Input: 115V AC / 60 Hz
- DC Input: 12V DC
Cooling Performance
- Cooling Capacity: 15,000 BTU
- Airflow: 350 CFM
- Thermostat Zones: Single or Multi-Zone Compatible
Dimensions
- Unit Dimensions: 40.40″ L × 29.22″ W × 11.10″ H
- Shipping Dimensions: 41.73″ L × 29.72″ W × 12.40″ H
Included in the Box
- Air Conditioner Unit
- Warranty Card
Installation Notes
This unit requires additional components for full installation:
For Non-Ducted Applications:
- FJXADBMWH – Manual Ceiling Controls
For Ducted Applications:
- 3317404.000 – For use with wall thermostat (sold separately)
Single Zone Control Kit (Cool/Furnace)
- 3316230.700 or 3316230.714
Before You Order
Check the roof opening, ducted or non-ducted configuration, required controls, electrical supply, and white finish for your RV before ordering.
Frequently Asked Questions
What capacity and electrical input are listed?
The specifications list 15,000 BTU cooling, 115V AC at 60 Hz, and 12V DC input.
Which controls are listed by application?
The description lists FJXADBMWH manual ceiling controls for non-ducted applications and kit 3317404.000 for ducted use with a separately sold wall thermostat.
